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Acid leaching of vanadium from roasted residue of stone ...

Abstract: An effectively new technology of extracting vanadium from stone coals by high concentration sulfuric acid was researched. The effect of the concentration of sulfuric acid, leaching temperature, leaching time and helper leaching agent on the extraction of vanadium was explored.

Leaching vanadium by high concentration sulfuric acid from ...

Download Citation | Enhanced leaching of vanadium slag in acidic solution by electro-oxidation | An improved process for the leaching of vanadium from vanadium slag assisted by electro-oxidation ...

Leaching Vanadium By High Concentration Sulfuric Acid From ...

0.47% High Silica, High Aluminum and High Carbonaceous. SiO2-62-93%; Al2O3 > 7%; T > 10% The next step for NWME will be to investigate the application of NWME's proprietary technology to... | …

CN101591733B - Method for jarosite precipitation and ...

The optimized leaching conditions were obtained as the alloy powder 20 g, particle size 71~100 -m, temperature 75 ℃, ratio of liquid to solid 8 m L/g, sulfuric acid concentration 3.5 mol/L, volume of 30%(-) hydrogen peroxide 65 m L, which was dropwise added, and reaction for 6 h in sulfuric acid …

Acid leaching china-Henan Mining Machinery Co., Ltd.

The maximum extraction of vanadium (V) at a concentration of sulfuric acid 3,5-8,5 M does not exceed 90%. The disadvantage of this method is that the maximum extraction of vanadium (V) is achieved at high (3.5 to 8.5 M) concentration of sulfuric acid, which is accompanied by an increased consumption and the need for subsequent neutralization.

CN101591733A - Precipitating alum and removing iron method ...

Table 2 shows the high and low level for each of the tests, as well as two of the primary responses, namely vanadium recovery percentage and sulfuric acid consumption.

Optimization of sulfuric acid leaching of roasted ...

Precipitating alum and removing iron in a kind of high-iron zinc sulfide concentrate pressurized acid leaching still, high-iron zinc sulfide concentrate mixes in proportion with zinc oxide ore and is conveyed in the autoclave at 23: 1, controlling acidity makes the iron major part transfer the slag phase in zinc leaching process, a small amount of iron that leaches transfers water in leaching ...

LEACHING OF COBALT AND ALUMINUM BY SULFURIC ACID …

Combination with sulfuric acid, high amount of phosphoric acid and high leaching temperature can promote the leaching of vanadium. With the sulfuric acid concentration of 425.6 g/L, leaching temperature of 90 °C, leaching time of 4 h and liquid-solid mass ratio 2:1, the vanadium leaching rate of 90 wt.% can be achieved.

The method of processing of vanadium slag

Download Citation | The Design of Automation System on Nickel Stir Leaching Process of Sulfuric Acid | Based on the characteristics of nickel stir leaching production process of sulfuric acid in ...

Thin skinned asymmetric polybenzimidazole membranes with ...

that was used. Sulfuric Acid (98%) was the best leaching agent in the vanadium recovery if a calcination pre treatment is done, giving 96.2% of recovery. 3.2.3 Percentage of Solids Influence Percentage of solids were evaluated in the vanadium recovery using as agent leaching sulphuric acid (98%) in 50 g/L concentration, calcined sample,

Experimental Study on Intensified Leaching of Vanadium Ore ...

(2020). Leaching Kinetics of Vanadium and Chromium During Sulfuric Acid Leaching With Microwave and Conventional Calcification-Roasted High Chromium Vanadium Slag. Mineral Processing and Extractive Metallurgy Review: Vol. 41, No. 1, pp. 22-31.

What Are the Quartz Mining Processes? - Xinhai

The acids commonly used in the acid leaching process mainly include sulfuric acid, hydrochloric acid, nitric acid and hydrofluoric acid, the reducing agents mainly include sulfurous acid and its salts. The study shows that these acids have a good removal effect on the non-metallic impurities of quartz mineral.

Oxidizing Acid Leaching of Nickel-based Waste Superalloys ...

Aug 26, 2020· In many studies in the literature, sulfuric acid and hydrochloric acid are the most preferred for leaching in acidic environments [32,33,34,35,36]. It is stated in the literature that the consumption of sulfuric acid, which is the cheapest solvent for leaching of oxidized copper ores [ 37 ], varies between 0.4 and 0.7 tons H 2 SO 4 per ton of ...

The maximum extraction of vanadium (V) at a concentration of sulfuric acid 3,5-8,5 M does not exceed 90%. The disadvantage of this method is that the maximum extraction of vanadium (V) is achieved at high (3.5 to 8.5 M) concentration of sulfuric acid, which is accompanied by an increased consumption and the need for subsequent neutralization.

THE LEACHING BEHAVIOURS OF ASSOCIATED SULFIDE …

May 01, 2010· An effectively new technology of extracting vanadium from stone coals by high concentration sulfuric acid was researched. The effect of the concentration of sulfuric acid, leaching temperature, leaching time and helper leaching agent on the extraction of vanadium was explored.

The leaching of vanadium pentoxide using sulfuric acid and ...

The results show that the vanadium recovery yield increases with increases in temperature, sulfuric acid concentration, and leaching time and decreases with an increase in solid to liquid ratio.

A Satellite Imagery Review of the Pyongsan Uranium Mill

Abstract A study on leaching behavious of associated sulfide minerals,namely pyrite(FeS_2),chalcopyrite(CuFeS_2),stibnite(Sb_2S_3),and arsenopyrite (FeAsS),in the leaching of argentite (Ag_2S) with thiourea solutions was carried out.The influences of the concentrations of thiourea,ferric ion,and sulfuric acid as well as temperatures on the leaching of silver and other …

Enhanced leaching of vanadium slag in acidic solution by ...

Jul 01, 2020· A pair of research papers by a single North Korean author, dated 1989, also specifically describe processes for the handling of "sulfuric acid leaching liquors of uranium ore." [14] Buildings that conduct open-vat acid leaching require appropriate ventilation to remove dangerous and corrosive acid vapors produced during the leaching process.

GB2155917A - Method for leaching and recovering vanadium ...

The vanadium producing process with stone coal includes the following steps: crushing and pelletizing, roasting, acid dipping, depositing and filtering, ion exchange, deposition, dewatering and drying, and constant temperature burning. The present invention has the advantages of no pollution of HCl, sulfur dihydride and ore powder, waste slag with high calcium content for use as cement ...

Method of extracting vanadium from acid solutions

However, in these areas the pH D2EGFK to extract vanadium in oxidation state IV. The degree of extraction of vanadium(IV) is 96%. Reextraction about the solutions of hydrochloric or sulfuric acid with a concentration of 6 and 3 mol/l, or solutions of alkali or ammonia. [Reznik A.M., Nikonorova S.A. Extraction methods for the extraction of vanadium.

Extraction method of natural uranium concentrate from ...

FIELD: metallurgy. SUBSTANCE: invention can be implemented for extraction, purification and concentration of vanadium, for example at processing re-circulated mother solutions of production V 2 O 5 and acid solutions of leaching ashes after black oil burning. The method of extracting vanadium from weak-acid mediums consists in extracting with nitrogen containing extracting agent, in the ...

Method of vanadium extraction

-alloys for aerospace industry, as catalyst in the manufacture of sulphuric acid by the contact process, ceramics and batteries [1,2]. The major secondary sources of V are sludges generated during processing of bauxite ore by alumina industry, waste catalyst of H 2 SO 4 manufacturing industry, steel making slag, oil and coal residues, spent catalysts, and uranium co-products.

Highly efficient separation and extraction of vanadium ...

However, in these areas the pH D2EGFK to extract vanadium in oxidation state IV. The degree of extraction of vanadium(IV) is 96%. Reextraction about the solutions of hydrochloric or sulfuric acid with a concentration of 6 and 3 mol/l, or solutions of alkali or ammonia. [Reznik A.M., Nikonorova S.A. Extraction methods for the extraction of vanadium.

Method of recovery of vanadium from titanium-vanadium slag

Jan 01, 2014· This means that when there is enough sulfuric acid in solution, the leaching can be completed quickly. However, acid concentration must be kept high through the leaching process. This suggests that the final leach solution will have significant amounts of sulfuric acid which should be neutralized by sodium hydroxide before the purification step.

Recovery of Vanadium from Acid and Basic Leach Solutions ...

This double firing is carried out within 8-12 h, which allows us to have very high technological parameters, so the total extract (water and acid extraction) is 80-90%, at a high yield water-soluble - pure compounds of manganese and chromium, vanadium compounds. By acid decomposition of a candle, objgen the vanadium while the double firing ...